[pet-ee-uh l-yool, -uh-lool, pet-ee-ol-yool]
a small petiole, as of a leaflet in a compound leaf.
Origin of petiolule
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the stalk of any of the leaflets making up a compound leaf
Word Origin for petiolule
C19: from New Latin petiolūlus, diminutive of Latin petiolus; see petiole
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012